Method of removing surface faults from billets



Dec. 4 192 i I METHOD OF REMOVING SURFACE FAULTS FROM BILLETS Filed Oct. 30.- 1920 JOHN JAMES GOEFEY, F BETELME PENNSYLVANIA, ASSIGNOR TO BETHLEHEM STEEL COMPANY, OF BETHLEHW, PHTNSYLVANIA, A CORPOTION OF PENN- SYLV METHOD OF REMOVING- SURFACE FAUL'IS FROM BULLETS.

Application filed October 30, 1920. Serial No. 420,707.

To all whom it may concern:

Be it known that I, JOHN JAMES Corner, a citizen of the United States, and residing at Bethlehem, Lehigh County, State of Pennsylvania, have invented certain new of removin l5 mill practice that faults present in the ingot or billet will appear in the finished product if they are not removed before the completion of the rolling process, and also that a thorough removal of such faults either before the beginning of the rolling operations or at some intermediate stage, will insure a product having no serious surface imperfections, the rolling operations having the effect of filling out any hollows or shallow 3 cavities in the work resulting from the removal of defective portions of its surface. A common fault of railroad rails for instance, is that they may have longitudinal surface cracks or soft spots, if the faults of the original ingot are not carefully removed, the length of the useful life of the rail being thereby cut downv and the rail bein sometimes so weakened that it will brea ordinary trafic.

According to this invention, any ingot, bloom, slab, billet or sheet bar which, upon examination, appears to have surface faults, may be placed upon a movable bed of a milling machine or-in any position in which the defectsor faults may be reached by a cutting tool, such as a milling cutter or a routing tool operated by power mechanism whereu on, by efiecting the relative movement 0? the cutting tool and the work, the

seam or fault may be removed, no matter what its position, its shape, or its de th. In the accompanying drawings I have 1 ustrated difierent may be employe for the purpose and show under' being'by way of example only.

gypes of cutting tools which each tool in position to mill out a fault or defect which it is particularly adapted to remove.

In Figures 1 and 2 are illustrated two forms of cutting\ tools which will satisfactorily perform t e work required, the tools being illustrated in operative ositions In Figure 1 a pair of rose m1 ling cutters are shown, one of which is adjusted to remove a seam from a corner of a billet and the other of which is in position to remove a short seam from one of the sides.

The various cutters re selected in accordance with the work to be done and a cut of any width, depth and length may be made by selecting the proper tool. In Figure 2 I have shown a shell milling cutter in position to remove surface seams from the sides 1 of a billet. A convex milling'cutter ma be used where the seam extends some s ort distance into the billet while the shell milling cutter is used to remove shallow seams and defects. As before explained, the work maybe performed and the process ma be carried out by means of a milling mac ine of standard and well known construction, but it will be obvious that other machines may be employed to operate the cutters and that the cutter may be arranged to be moved relatively to the billet instead of having the billet moved relative to the cutter as is common in milling machines. Still other types of cutters may be used, the two illustrated Having thus described the invention what is claimed as new and desired to be secured by Letters Patent is:

1. The method of removing seams from billets and similar articles consisting in removing from the body of the billet the metal adjacent the seam and forming its marginal walls, by means of a cuttin tool, the cutting edge of the tool moving, in its cutting action, substantially transversely of the se 2. The method of removing seams from billets and similar articles consist' moving from the body of the billet the metal adjacent the seam and u a i its marginal in mg; 1,47e,eee

plurality of cutting eolges which successively Walls, by means of a cutting tool, the cutting move, in their cutting action, substantially edge of the tool being moved, in its cutting transversely of the seam. action, substantially transversely of the seam l 3. The method of removing seams from and also being simultaneously moved longi- U billets and similar articles consisting in retudinally of the seam.

moving from the body of the billet the metal In testimony whereof I afix m si ature. adjacent the seam and fiong its marginal JOHN JAMES 015 EY. 

